NEW BRITISH LICHENS, 107 
specimens were with difficulty obtained. Its systematic place is near 
L. dispansa, Nyl., from which it is well distinguished by the above 
characteristics. 
6. L. aphanoides, Nyl.; thallus obscurely olive-grey, thin, sub- 
verrucose or subgranulose, unequal, indeterminate or subevanescent ; 
apothecia black, small, convex, immarginate, naked, white within ; 
spores 8 in thecze, colourless, elliptical, simple, 0:009—0:013 mm. long, 
0:0045-0:0055 mm. thick; paraphyses not discrete; thalamium 
bluish, hypothecium colourless, or vaguely reddish below ; hymeneal 
gelatine blue, and then violet-reddish with iodine. 
On calcareous rocks of Craig Guie, near Crathie Church, in Braemar. 
August, 1868. Apparently rare, and gathered only very sparingly 
beside the limestone quarry. It is allied to Z. aphana, Nyl., a species 
found in Ireland by Mr. Carroll, both belonging to the group of L. 
J'urvella, Nyl. 
7. L. melaphana, Nyl.; thallus black, thin, opaque, unequal, some- 
what diffractate ; apothecia black, small, convex, immarginate, obscure 
within ; spores 8 in thecæ, colourless, oblong, simple, 0:011—19 mm. 
long, 0:0045—0-0055 mm. thick; paraphyses not discrete, epithecium 
with the upper portion of thalamium blue, hypothecium slightly 
brownish below ; hymeneal gelatine blue with iodine, and then partly 
of a violet colour. 
On granite boulders of Craig Guie, in Braemar. August, 1868. 
Like the preceding, to which it is closely allied, this species occurred 
but in very small quantity e the boulders which lie thickly 
scattered on the lower slope o hill. In both the specimens 
gathered, it was associated with pecie: fuscata, var. Sinopica. 
8. L. inserena, Nyl.; thallus obscurely cinereous, rimoso-areolate, 
the hypothallus black, visible or denudate ; apothecia somewhat tumid, 
black within ; paraphyses not discrete, epithecium bluish-brown, hypo- 
thecium with white opaque stratum beneath ; spores ellipsoid-oblong, 
0:014-17 mm. long, 0006-8 mm. thick ; hymeneal gelatine blue with 
iodine. 
On calcareous rocks of Craig Guie, in Braemar. August, 1868. 
This species, which belongs to the group of L. tenebrosa, Flot., occurs 
also on Morrone, according to specimens in my herbarium gathered 
there in 1861, but not. correctly named. 
In addition to these, I may here notice the two following sub- 
species, only one of which, however, is a new one :— 
